#7 Adjustable Gate Valve

• Both the ED pipe and pond drain pipe should be equipped with an adjustable gate valve

• Size one pipe schedule higher than the calculated design diameter

• Locate valves inside of the riser, where they will remain dry and can be operated safely and conveniently

• Lock the handwheel with a chain to a ringbolt, manhole step, or other fixed object

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Gate valves are used on the pond drain to drain the pond in emergency situations, or for emergency access. On the ED outlet, gate valves are used to provide the equivalent diameter necessary to provide the required detention time.